Bearing for scales.



s. c. DEWTT & s. B. WHISTLER- .BEARING FOR SCALES. APPLICATION FILED AU G- 16. I915.

1,245,202. Patented Nov. 6, 191?.

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section of the same.

UNITED STATES PATENT OFFICE.

GEo GE o. DEVITT AND snnEoEn B. WHISTLER, or BUFFALO, NEw YORK, nsslenons TO BUFFALO SCALE COMPANY, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

BEARING FOR SCALES.

Patented Nov. 6, 1917.

Application filed. August 16, 1915. Serial No. 45,645.

To all whom it may concern:

Be it known that we, GEORGE G. DEVITT and SANFORD B. WHISTLER, citizens of the United States, residing at Buffalo, in the county of Erie and State of New, York, have invented new and useful Improvements in Bearings for Scales, of which the following is a specification.

This invention relates to bearings for scales and more particularly to bearings'for this purpose which are'provided with antifriction means for preventing undue frictional contact between two scale members adjacent to the pivotal connection between the same.

The object of this invention is to provide an improved bearing ofthis character which is simple and inexpensive in construction and reliable in operation and which is provided with an anti-friction device of simple and efficient construction which can be readily applied to or removed from the hearing so that the same can be renewed when worn and which permits of reducing the frictional contact between two relatively movable scale members either on one side of the bearing or on opposite sides thereof.

In the accompanying drawings: Figure 1 is a side elevation, partly in section, of a platform scale provided with bearings constructed in accordance with our invention. on an enlarged scale, taken on line 22,

Fig. 1. Fig. 3 is a perspectiveview of one form of scale bearing embodying our invention. Fig. 4 is a vertical longitudinal Fig. 5 is a vertical transverse section of the same. Fig. 6*is a perspective view of the anti-friction device applied to the bearing. Fig. 7 is a fragmentary longitudinal section showing our improved bearing applied to a form of scale lever different from that shown in Figs. 1

and 2. Fig. 8 is an end view of the construction shown in Fig. 7. j

Similar characters of reference indicate corresponding parts throughout the several views.

Our improved bearing is applicable to various kinds of scales but as shown in the drawings the same is applied to a platform scale which consists essentially ofa hollow main frame or base 1 which is provided with an opening in its top, a platform 2 Fig. 2 is a cross section thereof,

I the side bars.

arranged above the frame and provided supported and the movement of the platform is transmitted to the scale beam in the usual and well known manner. These levers may be pivotally connected with each other by any suitable means, for instance 'by'a coupling ring 6 engaging with a pivot pin on the toe of the short lever 4 and a pivot pin 8 on the central part of the long lever 5. Intermediate of their ends these levers pivotally support the platform by providing these portions of these levers with pivot pins 9 engaging with bearing blocks 10 mounted on the lower ends of the platform legs, as shown in Fig. 1.

Our improved bearing and anti-friction device is embodied in this scale for pivotally supporting these levers at the heels thereof, at which places these levers are provided with the usual knife edge pivot pins 11. Our improved bearing and friction de vice may be variously organized and still accomplish the purpose for which the same is designed but in'its preferred form each of these bearings, as shown in the drawings, is constructed as follows:

12 12 represent two side pieces or cheeks which are preferably constructed of sheet metal and each of which is provided with an opening so as to form two upright side bars 13 a lower cross bar 14 connecting the lower ends ofthe side bars and an upper cross bar 15 connecting the upper ends of At the lower end of each opening of the side piece the same is provided with a flat horizontal seat 16, and

about midway of their height the side bars are provided with inwardly projecting lugs forming downwardly facing shoulders 17. These side pieces are arranged vertically and parallel with each other and the same are connected below their bearing openings by means of a lower longitudinal connecting member 18 and above the bearing openings by means of an upper connecting memconnecting rivets form the frame of the bearing and the same is supported on the main frame of this scale by means of a link arranged with its opposite endsin the lower part ofv the bearing openings of the side pieces and is provided with a fiat underside while its upper side is provided with a V- shaped bearing face which engages with the knife edge of the companion pivot pin extending lengthwise through the upper part of the bearing opening of the side pieces.

The shoulders 1710f the side pieces of the frame project inwardly over the upper longitudinal corners of the bearing block so as to hold the latter against vertical displacement and the longitudinal sides of the bearing block are confined against lateral displacement between the lower parts of the side bars of the side pieces. The bearing block is fitted comparatively loose in this part of the bearing frame so that the same is capable of a limited oscillation in a transverse direction relatively to the bearing frame in order to enable the bearing block to adapt itself freely to the shiftin of its companion pivot pin when the sea e is in use and thereby avoid interfering with the sensitiveness in the operation of the scale.

The bearing block is held against longitudinal'displacement in the bearing frame by means of a key which is preferably constructed of two sections which for convenience and cheapness of manufacture are preferably punched out of sheet metal and which are constructed to form two lower eye sections 28, 23 and two upper locking tongue sections 2%, 24. The sections ofthis key are placed with their eyes between the lower cross bars of the frame side pieces so that the lower connecting rivet 18 passes through these eyes and the tongue sections thereof project upwardly above this lower cross piece and into a locking recess or opening 25 formed in the underside of the bearing block, as shown in Figs. at and 5. By this means the bearing block is interlocked with the frame so that the same cannot move in a direction lengthwise of its bearing face and the pivot pin with which the same. cooperates. i The anti-friction device which is associated with this bearing, in its preferred form, is constructed as follows:

26 represents the body of the anti-friction device which is preferably constructed in r the form of a plate and arranged between the'underside of the bearing block and the anti-friction device in all cases withtwo cross bars. At its opposite ends this body plate is provided with two bearing lips 27 which project laterally across opposite ends of the bearing block, and on the outer side of each of these lips the same is provided with a bearing nose 28 which projects out- 'wardlyin a direction lengthwise of the bearing face of the block and the companion pivot pin. The central part of the body plate is provided with an opening 29 which coincides with the opening or recess of the bearing block and the locking tongue sections which enter the openings of the bearing block also project through the opening of the body plate. The key therefore operates as means for retaining the anti-friction device against longitudinal displacement between the bearing frame and bearing block which operation is also. performed by the lips of the anti-frlction device engaging with opposite ends of the bearing block.

This anti-friction device is preferably constructedfrom a single piece of sheet metal,

such as steel, so as to render the same cheap,

strong, and durable. When this hearing is utilized in connection with a pivot pin which projects laterally from one side only of a scale lever only one nose of the anti-friction device engages with the opposing surface of this lever for the purpose of reducing the frictional contact between adj acent relatively movable parts of the scale, as shown in Figs. 1 and 2. I

But if thisanti-friction device is'used, in a bearing which hasits block engaging with a pivot pin 30 supported at its opposite ends by' the arms 32, 32 of a bifurcated lever 31, as shown in Fi s. 7 and 8, both reduce the frictional contact between the samea-nd thebea-ri'ng. I p

In practice it is desirable to construct the bearing'noses whlch'are arranged on opposite sides of the bearing regardless of whetherthesanie is to'be used on a scale having pivots which are supported only at one end as well as, pivots which are supported at opposite ends, inasmuch as this permits of a uniformity of construction and avoids the'necessity of exercising any partlcular care when assembling the parts of the scale as to whether or not one endorthe other of the bearing faces the opposing side of'the scale lever, thereby effecting a saving in time and a reduction in the cost of putting up the scales.

Our improved scale bearing and anti-friction device can be produced at compara tively low cost. The same is very strong and not liable to get out of order and'when the noses of the anti-friction device becomeworn this device can-be readily replaced by a new one for the purpose of maintaining the accuracy of the scale.

We claim as our invention:

1. A bearing for scales comprising a frame having two side pieces each of which is provided with an opening one end of which forms a seat and also provided with internal shoulders which face said seat, a bearing block arranged at its opposite ends in the openings of said side pieces and engaging at its rear side with the seats thereof and at its front side with said shoulders, and means for holding said block against lengthwise movement in said side pieces.

2. A bearing for scales comprising a frame having two side pieces each of which is provided with an opening one end of which forms a seat and also provided with internal shoulders which face said seat, a bearing block arranged at its opposite ends in the openings of said side pieces and engaging at its rear side with the seats thereof and at its front side with said shoulders, and means for holding said block against lengthwise movement in said side pieces comprising a key mounted on the side pieces and engaging with a recess in the rear side of said bearing block.

3. A bearing for scales comprising a frame having two side pieces each of which is provided with an opening one end of which forms a seat and also provided with internal shoulders which face said seat, a bearing block arranged at its opposite ends in the openings of said side pieces and engaging at its rear side with the seats thereof and at its front side with said shoulders, said block being also provided on its rear side with a recess, a rivet connecting said side pieces in the rear of said block, and a key having an eye mounted on said rivet and provided with a tongue engaging said recess in said block.

4. A bearing for scales comprising a frame, a bearing block mounted on said frame and adapted to engage with a pivot pin of the scale, and an anti-friction device comprising a body plate arranged between the back of said block and the adjacent part of said frame, a lip arranged on the end of said body plate and extending across the end of said block, and a bearing nose projecting laterally from said lip and adapted to engage an adjacent member of the scale.

5. A bearing for scales comprising a frame, a bearing block mounted on said frame and adapted to engage With a pivot pin of the scale, and an anti-friction device comprising a body plate arranged between the back of said block and the adjacent part of said frame, lips arranged on opposite ends of said body plate and extending across the opposite ends of said block, and bearing noses arranged on said lips and projecting laterally therefrom.

6. A bearing for scales comprising a frame, a bearing block mounted on said frame and adapted to engage with a pivot pin of the scale, and an anti-friction device comprising a body plate arranged between the back of said block and the adjacent part of said frame, said block and body plate being provided with coinciding openings, a lip arranged on the end of said body plate and extending across the end of said block, a bearing nose arranged on said lip and projecting laterally therefrom and adapted to engage an adjacent member of the scale, and a key mounted on the frame and engaging s with said openings.

7. A bearing for scales comprising a frame having two side pieces each of which has an opening forming a seat and front and rear rivets connecting said side pieces in front and in rear of said openings, a bearing block arranged in the openings of said side pieces and having a front bearing face adapted to engage a pivot pin of the scale and provided on its rear side with a locking opening, .an anti-friction device having a body-plate arranged between said seats and the rear side of the block and provided with an opening, lips arranged on the ends of said body plate and extending across the ends of said block and noses arranged on said lips and projecting laterally therefrom and adapted to engage an adjacent scale member, and a key having an eye mounted on said rear rivet and engaging said openings of the body plate and bearing block.

GEORGE O. DEVITT. SANFORD B. WHISTLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C. 

